Phenotypic and Gene Expression Alterations in Aquatic Organisms Exposed to Microplastics

Area of Science:

• Environmental Science
• Ecotoxicology
• Marine Biology

Background:

• Plastic pollution is a growing global concern due to the persistence and widespread accumulation of plastic debris in ecosystems.
• Microplastics, defined as plastic particles <5mm, are prevalent in aquatic environments and readily ingested by marine organisms.
• Microplastics can adsorb environmental pollutants, forming complexes that may enhance toxicity to aquatic life.

Purpose of the Study:

• To review the impacts of microplastics on aquatic organisms, focusing on both individual and combined effects with adsorbed pollutants.
• To examine alterations in aquatic organism phenotype and gene expression following exposure to microplastics.

Main Methods:

• Literature review of studies investigating the effects of microplastics on aquatic organisms.
• Analysis of research detailing changes in organismal development, growth, and gene expression patterns.
• Consideration of studies examining the synergistic effects of microplastics and co-pollutants.

Main Results:

• Exposure to microplastics alone or with adsorbed pollutants causes abnormal hatching, development, and growth in aquatic organisms.
• Significant alterations in gene expression, especially within the antioxidant system, are observed in exposed organisms.
• Combined exposure to microplastics and pollutants can lead to magnified harmful effects.

Conclusions:

• Microplastics present a substantial threat to aquatic ecosystems, impacting organismal health and development.
• Understanding the molecular mechanisms, including gene expression changes, is crucial for assessing microplastic risks.
• Further research is needed to fully elucidate the long-term consequences of microplastic and co-pollutant exposure on aquatic life.